257676257 has 2 divisors, whose sum is σ = 257676258. Its totient is φ = 257676256.

The previous prime is 257676241. The next prime is 257676283. The reversal of 257676257 is 752676752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185068816 + 72607441 = 13604^2 + 8521^2 .

It is a cyclic number.

It is not a de Polignac number, because 257676257 - 2⁴ = 257676241 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257676227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128838128 + 128838129.

It is an arithmetic number, because the mean of its divisors is an integer number (128838129).

Almost surely, 2^257676257 is an apocalyptic number.

It is an amenable number.

257676257 is a deficient number, since it is larger than the sum of its proper divisors (1).

257676257 is an equidigital number, since it uses as much as digits as its factorization.

257676257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1234800, while the sum is 47.

The square root of 257676257 is about 16052.2975614085. The cubic root of 257676257 is about 636.3432881972.

The spelling of 257676257 in words is "two hundred fifty-seven million, six hundred seventy-six thousand, two hundred fifty-seven".